You are able to program 2009 MAZDA MIATA MX5 Remote NF49-67-5RYB key by yourself if you have two working keys (or keys that start the vehicle). The new remote key will first need to be cut to match your original at an automotive locksmith or the dealership. Once the remote head key is cut, you can use the printed programming instructions that we send to make the remote key work for 2009 MAZDA MIATA MX5. The instructions are very easy to understand and can be performed in less than a minute. If you only have one or you lost all working key for the vehicle, the programming can only be done at the locksmith or dealership that cuts the key for you. This Remote key comes with New battery installed and is tested for functionality before sending.